Switch control and indication system



H. S. YOUNG SWITCH CONTROL AND INDICATION SYSTEM Filed Aug. 17, 1938 Rm v.

MW M

A W s HY I e Patented Oct. 24, 1939 UNITED STATES PATENT OFFICE 2,177,125 SWITCH CONTROL AND INDICATION SYS TEM

Application August 17, 1938, Serial No. 225,413

21 Claims.

My invention relates to a system for securing over a pair of control wires and a common wire remote control of a motor for operating a railway switch, and for also securing at the control point over the same wires an-indication of the position of the switch.

It is an object of my invention to provide a system of the type described which employs neutral control and indication circuits.

A further object of my invention is to provide a system of the type described and which will eliminate the necessity for a split battery.

Another object of my invention is to provide a system of the type described which incorpo- 15 rates means located in the vicinity of the switch for preventing storage of switch control.

A further object of my invention is to provide an improved switch control and indication system.

Other objects of my invention and features of novelty will be apparent from the following description taken in connection with the accompanying drawing.

I shall describe one form of apparatus em- 25 bodying my invention, together with a modification which I may employ, and shall then point out the novel features in the claims.

In the drawing,

Fig. 1 is a diagram illustrating a system em- 30 bpdying my invention, and Fig. 2 is a fragmenftagmdiagram illustrating a modification of the a system shown in Fig. 1.

Similar reference characters refer to similar parts in both views.

Referring to Fig. 1 of the drawing, the reference character W designates a railway track switch which is operated between a normal and a reverse position by means of a motor M. The motor M is controlled by a normal switch con- 40 trol relay NWR and a reverse switch control relay RWR, in such manner that the motor M is caused to operate the switch W to its normal position when the relay NWR, is energized and the relay RWR is deenergized, while the motor is caused to operate the switch W to its reverse position when the relay RWR is energized and the relay NWR is deenergized.

I The relays NWR and RWR are controlled by a 50 polarized switch repeating relay WP, a slow release neutral relay WRP and a lock relay LR, in a manner hereinafter described in detail.

The switch repeating relay WP is controlled by contacts Ill and H which are operatively associ- 55 ated with the switch W so as to be actuated to one position or another according as the switch occupies its normal or reverse position.

The switch contact Ill is constantly connected by a wire M to one terminal B of a battery l5 located in the vicinity of the switch W, while the switch contact H is constantly connected by a wire IE to a terminal C of the battery l5.

When the switch W is in the normal position, the contact l0 engages a stationary contact which is connected by a wire l8 to one terminal of the winding of the relay WP, While in this position of the switch W the contact I l engages a stationary contact which is connected by a wire l9 to the other terminal of the winding of the relay WP with the result that the winding of the relay WP is energized with current of one relative polarity supplied from the battery l5, and the polar contact 20 of the relay WP, as well as the other polar contacts of this relay, is caused to assume its normal position as shown in the drawing.

Similarly, when the switch W is in the reverse position, the contact l0 engages a stationary contact which is connected by the wire l9 to a terminal of the winding of the relay WP, While in this position of the switch W the contact ll engages a stationary contact which is connected by the wire l8 to a terminal of the winding of relay WP with the result that the winding of the relay WP is energized with current of the opposite relative polarity supplied from battery l5 and the polar contact 20 of relay WP is caused to move to its reverse position.

The polar contact 20 of relay WP is connected .by a wire 24 to terminal C of a battery 25 located at a point remote from the switch, such as at an interlocking tower from which it is desired to control the switch W. The wire 24 may be a common wire which is employed in circuits other than the switch control and indication circuits illustrated in this application.

The polar contact 20 when in its normal position as shown in the drawing engages a contact 28 which is connected by a wire 35 to one terminal of the winding of the relay NWR. The polar contact 20 when in its reverse position engages a stationary contact 32 which is connected by a wire 33 to a terminal of the winding of the relay RWR.

It will be seen, therefore, that when the switch W is in the normal position, the winding of relay WP is energized with current of one relative polarity, and the polar contact 20 of relay WP operates to establish a circuit from common wire 24, and thereby from terminal C of battery 25,

to wire 39 leading to a terminal of the winding of the relay NWR. Similarly, when the switch W is in the reverse position, the polar contact 29 of relay WP establishes a circuit from wire 24 to the wire 33 leading to a terminal of the winding of relay RWR. 1

A branch of the wire 30 is connected to a stationary contact 35 of relay WRP. The contact 35 is engaged by a movable contact 36 when the relay winding is energized, while the contact 36 has connected thereto a branch of wire 33.

It will be seen, therefore, that when the contact 36 of relay WRP is picked up, a circuit is established between wires 30 and 33 with the result that regardless of whether the contact 29 of relay WP operates to establish a circuit from the common wire 24 to either wire 39 or towire 33, a circuit is also established from Wire: 24 to the other of these wires over the contact 36 of relay WRP.

One terminal of the winding of the relay WRP is constantly connected by a branch of wire I 6 to terminal C of the battery l5, while the other terminal of the winding of this relay is connected by a wire 49 to a stationary contact 4! of relay NWR and to a stationary contact 42 of relay RWR. The relay NWR has a movable contact 43 which when picked up engages a stationary contact 4|, while the relay RWR has a movable contact 44 which when picked up engages the stationary contact 42. The contacts 43 and 44 are connected by branches of wire 39 to a contact 45 which when the lock relay LR is energized is engaged by a contact 92 to which is connec'ted wire 14 leading to terminal B of the battery Hi. It will be seen, therefore, that the winding of relay WRP 'will be energized when the contacts of either of the relays RWR and NWR are picked up, providing the contact 92 of the lock relay is picked up, and will be deenergized when the contacts of both relays RWR and NWR are released or when the contact of the lock relay is released. I

This system includes means located at the point from which it is desired to control the switch W and operable to selectively energize the switch control relays NWR and RWR to thereby efiect operation of the motor M to move the switch from one position to the other.

At the control point there is located a switch control leverL which is movable between a normal and a reverse position. Associated with the lever L are contacts '46 and 47 which are movable with the lever. The contact 46 has connected thereto a control wire 50 leading to a movable contact 5| of relay RWR, while the contact '3'! has connected thereto a control wire 52 leading to a movable contact 53 of relay NWR.

In the normal positionof the lever L the contact 48 engages a stationary contact 55 which is connected by a wire 56 to a terminal of the winding of relay LKR, the other terminal of which is connected by a wire 58 to terminal B of the battery 25. In the normal position of the lever L the contact 41 engages a stationary contact :69 which is connected by a wire 6! to a terminal of the winding of the relay WKR, the other terminal of which is connected by wire 62 tothe terminal C of battery 25.

"Inthe reverse position of the lever L the con-,

tact 99 engages a stationary contact 64 to which is connected a branch of wire 6|, while the contact 6'. engages a stationary contact 65 to which is connected a branch of wire56.

The relay LKR has a movable contact 66 which engages stationary contact 16 which is connected when picked upengages a stationary contact which is connected to one terminal of the transit light TL, the other terminal of which is connected by wire 62 to terminal C of battery 25. The contact 66 when released engages a stationary contact which is connected to one terminal of the lock light LL, the other terminal of which is con-' nected by wire 62 to terminal C of battery 25.

The contact 66 is connected by a wire 68 to contact 69 of relay WKR, while contact 69 when released engages a stationary contact 19 to which is connected a branch of wire 58 leading from terminal B of the battery 25.

The contact 5| of relay RWR to whichis connected control wire 59 engages, when picked up, stationary contact 12 which is connected by a wire 13 to reverse polar contact 14 of polarized switch control relay WP.

The contact 5| of relay RWR when released to movable contact 71 of lock relay LR, while the contact 1'! when picked up engages a stationary contact 18 which is connected by a wire 19 to one terminal of the switch control relay NWR, the other terminal of which has connected thereto the wire 39 leading to normal polar contact 28 of polarized switch control relay WP.

The contact 53 of relay NWR, to Which is connected control wire 52, when picked up engages a stationary contact 8| which is connected by a wire 82 to a normal polar contact 83 of polarized switch control relay WP. The contact 53 when released engages a stationary contact 85 which is connected by a Wire86 to a contact 87 of relay LR. The contact 81 is engaged by a movable contact 89 of relay LR when the contact 89 is picked up, while the contact 89 is connected by a wire 99 to one terminal of the winding of the relay RWR.

The lock relay LR is provided with a winding, while the circuit for energizing thiswinding is controlled in the well-known manner by means responsive to traffic conditions in the vicinity of the switch W so that the relay winding is energized only when it is safe to effect movement a of the switch W between its two positions, and. is deenergized at all other times.

The details of the system for controlling the circuit of the winding of the lock relay LR form no part of my invention, and one form of con- 56 trol system for the circuit of this winding which I may employ is shown in United States Patent No. 1,959,072 to Herbert A. Wallace. 7 7

The lock relay LR has a contact 92 to which is connected a branch of the wire l4 leading from 5 terminal B 'of battery l5, while the contact 92 when released engages a stationary contact 93 which is connected by a wire 94 to a stationary contact 95 associated with the relay WP. As previously pointed out the contact 92 of the lock 60 relay LR when picked up engages contact 45 to which is connected wire 39 leading to the contacts 43 and 44 of relays NWR and RWR.

The polarized switch control relay WP has a neutral contact 96 which when picked up engages 5 the contact 95, while the contact 9E'is connected to a polar contact 91.

The polar contact 91 when in its normal position, as shown in the drawing, engages a stationary contact 98 which is connected by a wire 7 0 99 to a switch contact Hill. The polar contact 9'! when in its reverse position engages a stationary contact I02 which is connected by a wire I94 to a switch contact I96. 7

In all positions of the switch W except the 7B normal position thereof the switch contact I engages/51" stationary contact I08, while the contact I0! has connected thereto a branch of the wire 19 which is connected to one terminal of thewinding of the relay NWR.

Likewise'the switch contact I06 in all positions of the switch W except the reverse position ing of relay RWR is energized,

thereof engages a stationary contact H0 which has connected thereto a branch of the wire 90 which is connected to one terminal of the winding of the relay RWR.

The switch W also has associated therewith contacts H4 and, H5 which control the energizing circuits of the motor M. The contacts H4 and H5 are connected by a wire H6 to one terminal of the field Winding I I8 of the motorM, while the other terminal of the field winding H8 has connected thereto a branch of the wire I6 leading from the terminal C of the battery I5.

The contact H4 engages a stationary contact I20 in all positions of the switch W except the normal position thereof, while the contact H5 engages a stationary contact I2I in all positions of the switch W except the reverse position thereof.

The contact I20 is connected by a wire I23 to a stationary contact I24 which is engaged by a movable contact I25 of the relay RWR when the relay winding is deenergized. When the windthe contact I25 is picked up and it engages a stationary contact I26 to which is connected a branch of the wire I4 leading from terminal B of battery I5.

The contact I25 of relay RWR, is constantly connected to one of the brushes I28 associated with the armature I30 of motor M.

The contact I2I is constantly connected by a wire I32 to a stationary contact I33 associated with the relay NWR. The contact I33 is engaged by a movable contact I34 of relay NWR when the contact I34 is released, while the contact I34 is connected by a wire to brush I35 associated with the armature I30 of motor M.

The contact I34 of relay NWR when picked up engages a stationary contact I36 which has connected thereto a branch of wire I4 leading to terminal B of the battery I5.

The construction of the system having been described, its operation will now be explained. The system is shown in the drawing with the various parts of the apparatus in the positions which they assume when the switch W is in the-normal position, the control lever L is also in the normal position, and the lock relay LR, is energized.

As the switch W is in the normal position the switch contacts I0 and II operate to establish a circuit to energize the winding of the relay WP with current of the normal polarity with the result that the neutral contacts 85 and 96 of relay WP are picked up, while the polar contacts 20, 84 and 91 are in their normal positions as shown.

At this time the winding of switch control relay NWR is energized over a circuit which is traced from terminal B of battery 25 through wire 58, winding of relay LKR, wire 56, contacts 55-46, wire 50, contacts 5I-I6 of relay RWR, contacts 11-18 of relay LR, wire I9, winding of relay NWR, wire 30, normal polar contacts 28-20 of relay WP and common wire 24 .to terminal C of battery 25,

At this time the winding of relay RWR is deenergized since the contact 53 of switch control relay NWR is picked up, thereby interrupting connection from wire 52 to contact 85, and since polar contact 91 of switch repeating relay WP is in its normal position, thereby interrupting connection with wire I04 which is also connected to wire 90 leading to the terminal of the winding of relay RWR.

As the contacts of relay NWR are picked up contact 43 engages contact 4| and completes a circuit from wire 39 leading from contact 45 of lock relay LR to wire 40 leading to a terminal of the winding of the relay WRP, the other terminal of which is connected by wire I6 to terminal C of the battery I5. At this time the contact 92 of lock relay LR. is assumed to be picked up and accordingly the winding of the relay WRP is energized and the contact 36 is picked up and establishes a circuit from wire 30 to wire 33 leading to the terminal of the winding of the relay RWR, and to the normal polar contact 32 of relay WP. The winding of relay RWR, however, remains deenergized since contact 53 of relay NWR is picked up and polar contact 9'! of relay WP is in the normal position.

At this time as the contacts of relay NWR are picked up contact I34 engages stationary contact I36 to establish a circuit from terminal B of battery I5 to the brush I35 of the motor M.

Likewise, as the contacts of relay RWR are released the contact I25 engages stationary contact I24 to connect brush I28 to wire I23 leading to switch operated contact I20. However, at this time, the switch W being in the normal position, the contact H4 is not in engagement with contact I20 with the result that the circuit for the armature I30 of the switch motor M is interrupted and the motor therefore is not operated.

At this time a circuit is established to energize the winding of the relay LKR with current supplied by the battery 25. This circuit is the same as that for relay NWR and is traced from terminal B of battery 25 through wire 58, winding of relay LKR, wire 56, control lever contacts 55-46, control wire 50, contacts 5I-I6 of relay RWR, contacts 11-18 of relay LR, wire I9, winding of relay NWR, wire 30, normal polar contacts 28-20 of relay WP, and wire 24 to terminal C of battery 25. As the winding of the relay LKR is energized the contact 66 thereof is picked up and establishes a circuit from wire 68 to the terminal of the transit light TL.

In addition, when the control lever L and the switch W are in correspondence, a circuit is established to energize the winding of relay WKR. wtih current supplied from battery I5. This circult is traced from terminal B of battery I5 through wire I4, neutral contacts 88-85 and polar contacts 84-83 of switch repeating relay WP, wire 82, contacts 8I-53 of relay NWR, control wire 52, control lever contacts 41-60, wire 6I, winding of relay WKR, wire 62 to common wire 24, and thence to wire I6 and terminal C of battery I5.

As the winding of relay WKR is energized the contact 69 of this relay is picked up, thereby interrupting the circuit to the transit light TL, while the circuit of the lock light LL is additionally interrupted since the contact 66 of relay LKR, is picked up.

At this time, therefore, the lamps TL and LL are both deenergized to thereby indicate that the switch W and the control lever L are in correspondence and that the switch is not locked.

If at this time the operator wishes to move the switch W from the normal position to the release type.

As a result of this movement of the control lever L the previously traced circuits for energizing the relays NWR, LKR and WKR will be interrupted, while a circuit will be established to energize the winding of the relay RWR.

On deenergization of the winding of relay NWR. its contact All is released, thereby interrupting the circuit for energizing the winding of the relay WRP. On interruption of the energizing circuit of the winding of relay WRP the contact 35 of this relay does not release instantaneously, however, since the relay WRP is of the slow As a result the contact 35 will be maintained picked up for a short time interval and will continue to establish connection between wire 38 leading from the normal polar contact 28 of relay WP to the wire 33 leading to a ter-- minal of the winding of the relay RWR.

On movement of the switch lever L to the reverse position its contact ll engages contact 65 and thereby establishes a circuit from terminal B of the battery 25 to control wire 52, this circuit including wire 58, winding of relay LKR, wire 56 and contacts 65-41. At this time contact 53 of relay NWR is released and engages stationary contact so that on completion of a circuit from terminal B of battery 25 to control wire 51a circuit is completed through contacts 53-85 of relay NWB, wire 85, contacts 81-89 of lock relay LR, to wire leading to a terminal of the winding of relay RWR. At this time the other terminal of the winding of relay RWR is connected to terminal C of the battery 25 by means of a circuit which includes wire 33, contacts 36-35 of relay WRP, wire 30, normal polar contacts 28-20 of relay WP and common wire 24.

As the circuit for energizing the relay RWR'is complete, the contacts of this relay will pick up and contact 44 will engage stationary contact 42 to again complete the circuit for energizingthe winding of the relay WRP with the result that contact 36 ofthis relay will be maintained picked up and will maintain the circuit for energizing the winding of relay RWR.

On release of the contact of relay NWRvthe contact i3 3 engages contact I-33 to thereby connect the brush E35 of switch motor Min series with the field winding H8. On picking up of the contacts of relay RWR-the contact thereof connects brush I28 of switch motor M to terminal B of the-battery l5, and the motor M is now caused to-operate to move the switch W from the normal position to the reverse position.

On movement of the switch W the switch contacts It and E! are moved out of engagement with the stationary contacts to whichare connected the wires l8 and i9, respectively, thereby deenergizing the winding of the switch control relay WP. However, because of the internal-construction of the polarized switch control relay WP, the polar contact 20 thereof remains in engagement with the normal polar contact 28 to thereby maintain the circuit to the winding of the switch control relay RWR.

On movement of the switch W to-the reverse position the contact H5 is moved out of engagement with the contact lZl, thereby i-nterrupting the circuit for energizing the field winding H8 and the armature I30 of the switch motor Mwith the result that the switch motor M no longer operates.

In addition, on movement of the switch W to the reverse position the switch contacts ID and is connected a branch of the wire 19, Wisi switch contact I! engages a stationary cont-s, 5'. I

which is connected a branch of the wire l8.

cordingly, the winding of the relay W? is ener:

gized with current from the battery l5 of a polarity such as to cause movement of the polar contacts of the relay from their normal to thei reverse positions. I

On this movement of the polar contact 20,.the wire 33 leading from a terminal of the switch control relay RWR is directly connected to the common wire 24, and thereby to the terminal C of battery 25, instead of being connected to wire 24 by way of normal polar contact 28, wire 3.0 and contacts 35-36 of relay 'WRP.

On movement of the switch control lever L from the normal to the reverse position the previously traced circuit for energizing the winding of the relay LKR is interrupted and another circuit for energizing this relay is established. This circuit is the same as that for energizing the Winding of relay RWR and is traced from terminal B of battery 25 through wire 58', winding of relay LKRI, wire 55, control lever contacts 35-47, control wire 52, contacts 53-85 of relay NWRA, wire 85, contacts 81-89 of relay LR, wire 95, winding of relay RWR, wire 33, contacts 35-35 of relay WRP, wire 30, normal polar contacts 28-20 of relay WP and common wire 24 to terminal B of battery 25.

When the polarcontact 20 of relay WP is operated from its normal to its reverse position, the winding of relay LKR continues to be energized over the previously traced circuit, except that instead of connection from Wire 33 to common wire 24 being made over contacts 35-36 of relay WRP and normal polar contacts 28-20 of relay WP, this connection is now established by means .of the reverse polar contacts 32-25 of relay WP.

It will be seen, therefore, that on movement of the switch control lever L from the normal to the reverse position the relay LKR is maintained energized with the result that the contact 66 remains picked up.

On movement of the switch control lever L from the normal to the reverse position the circuit for energizing the winding of relay WKRis interrupted by opening of the control lever contacts 47-60, and the contact 59 of relay WKR is released and engages contact 10 to thereby establish a circuit from wire 58, leading from terminal Bof battery 25, to wire 58 leading to contact 66, which at this time engages the stationary contact which is .connected to .a terminal of transit light TL. The transit light TL, therefore, will be supplied with-energyandwill be illuminated to indicate that the switch control lever L and the switch RN are out :of, correspondence.

On movement of :the switch control lever L to the reverse position contact 45 engages contact 64 to thereby-connect wire Bl leading from-the terminal of the winding of relay WKR to control wire 50 which is connected to contact 5lof relay RWR. When the-contacts of ,relayRWRbecome picked up on energization of the winding of this relay,.contact 5| engages contact 72 which is connected bywire 13 to reverse polar contact 14 of switch repeating-relay WP.

At the time the switch control lever L is moved to the reverse positionthe polar contacts of the switch repeating relay are in their normal positions, and hence the circuit for-energizing a the winding of relay WKR is interrupted. On

"movement of the switch W to the reverse position the polar contacts of the relay WP are caused to move to the reverse position, as previously explained, with the result that polar contact 84 engages contact 14, while the neutral contact 85 of this relay is picked up and a circuit is established from wire 13 to wire [4 which is connected to terminal B of battery I3. The circuit from one terminal of the winding of relay WKR to terminal B of battery I 5 is now complete, while the other terminal of winding of relay WKR is connected to terminal C of battery l5 by way of wire 62, common wire 24 and wire IS. The winding of relay WKR, therefore,

will be energized as soon as the switch W completes its movement to the reverse position, and

-on energization of the winding of this relay the contact 69 will become picked up, thereby interrupting the circuit for energizing the transit light TL. This lamp, therefore, will no longer be illuminated and will indicate that the switch control lever L and the switch W are again in correspondence.

A similar sequence of operation takes place when the switch W is in the reverse position and the operator wishes to move it to the normal position. When the switch W is in the reverse position and the control lever L is also in the reverse position, the winding of the relay RWR is energized over the previously traced circuit, while the winding of relay NWR is deenergized. Inaddition, the switch contacts I!) and II operate to supply current of reverse polarity to the winding of the relay WP with the result that the polar contacts of this relay occupy their reverse positions, while the neutral contacts of the relay are picked up.

Furthermore, as the contacts of relay RWR are picked up, the contact 44 establishes a circuit to energize the winding of relay WRP with the result that its contact 36 is picked up and establishes a connection between wire 33 and wire 30.

On movement of the switch control lever L from the reverse position to the normal position the previously traced circuit for energizing the winding of relay WKR is interrupted due to disengagement of control lever contact 46 from contact 64 with the result that contact 69 of relay WKR, is released and establishes a circuit to light transit light TL to indicate that the control lever L and the switchW are out of correspondence. I

' 1 ,In addition, upon movement of the control lever L from the reverse to the normal position contact 41 is moved out of engagement with contact 65, thereby interrupting the circuit for energizing the winding of relay RWR. On deenergization of the winding of relay RW'R, the contacts of this relay release and contact 44 interrupts the energizing circuit for the winding of the slow release relay WRP, but, as previously explained, contact 36 of relay WRP does not re.- lease instantaneously.

On movement of the switch-control lever L from the reverse to the normal position contact 46 is moved into engagement with the contact 55 to thereby complete a circuit for energizing the winding of the relay NWR,. This circuit is traced from terminal B of battery 25 through wire 58, winding of relay LKR, wire 58,;contacts 55-46 of control leverL, control wire 50, contact 5|-16 of relay RWR, contacts 11-18 of reverse polar contacts 32-20 of relay WP, and common wire 24 to terminal C of battery 25.

As the contacts of relay NWR are picked up and as the contacts of relay RWR are released, circuits are established to energize the switch motor M to cause it to operate in a direction to move the switch from the reverse to the normal position. The energizing circuit for the motor M is interrupted on movement of the switch W to the normal position by movement of contact H4 out of engagement with contact I20.

On picking up of the contacts of relay NWR,, contact 43 establishes a circuit from wire 39 to wire 40 leading to a terminal of the winding of relay WRP. This winding is energized, therefore, and contact 36 is maintained picked up to maintain connection between wires 33 and 30, and thus maintain the energizing circuit for the winding of relay NWR,.

On movement of the switch control lever L to the normal position the winding of relay LKR is energized in series with the winding of the relayNWR over the circuit traced in detail in connection with relay NWR, and as the winding of relay LKR is energized, its contact 65 remains picked up.

On movement of the switch W from the reverse to the normal position the switch operated contacts l8 and H operate to again supply current of normal polarity to the winding of the relay WP with the result that the polar contacts of this relay are caused to move from their reverse to their normal positions.

On this movement of the polar contacts of relay WP a circuit is established to again energize the winding of relay WKR. This circuit is traced from terminal B of battery I5 through Wire 14, neutral contacts 88-85 and polar contacts 8483 of relay WP, wire 82, contacts 8I53 of relay NWR, control wire 52, switch On movement of the polar contact 20 of the switch repeating relay WP from the reverse to the normal position a circuit is established to connect wire 30, leading from a terminal of the winding of relay NWR, directly to the common wire 24 instead of over the wire 33 and the contacts 36--35 of relay WRP. Accordingly, on movement of the polar contacts of relay WP from their reverse to the normal positions the circuit for energizing the winding of relay NWR, is maintained and the contacts of this relay are maintained picked up.

The system provided by this invention is arranged so that the position of the switch W cannot be changed when the lock relay LR is deenergized. The system is also arranged so that when the lock relay LR is deenergized, the lock light LL is lighted to indicate that the switch W cannot be operated.

When the winding of the lock relay LR is deenergized, the contact 11 of the relay LR nolonger engages contact 18 and thereby interrupts the energizing circuit for the winding of the relay N'WR with the result that the winding of relay NWR' cannot be energized. Similarly, when the winding of relay LR is deenergized, the contact 89 is'released, thereby interrupting the circuit for the winding of the relay RWR with theresult that the contacts of this relay are released.

' When the contacts of both the relays RWR and the 1001: relay LR is deenergized, the winding of.

the relay LKR will also be deenergized and its contact 66 will be released and will engage a stationary contact which is connected to one terminal of the lock light LL.

It will be seen also that when the lock relay LR is deenergized, the energizingcir'cuit of the relay WKR. will also be interrupted. If the switch control lever L is in the normal position, as shown in the drawing, so thatthe contact 4] engages the contact 60 and connects wire 6| to control wire 52, the energizing circuit of the winding of relay WKR will be interrupted since contact 53 of relay NWR is released and engages contact 85 to which is connected'wire 06 leading to contact 81 which at this time is not engaged by contact 89 of lock relay LR.

Similarly, if the control lever L is in its reverse position so that contact '46 engages contact 64 to connect wire 6| to control wire 50, the circuit of the winding of relay WKR will also be deenergized. This will be true because wire is connected to contact 5! of relay RWR which at this time is released and engages contact I6 which is connected to contact I! of lock relay LR, which Contact is released, thereby interrupting the circuit.

It will beseen, therefore, that regardless of the position of the switch control lever L, when lock relay LR is released the winding of relay WKR will be deenergi'zed and contact 69 of relay WKR will be released and will engage contact I0 and thus connect terminal B of battery 25 to wire 68 which is connectedby contact 66 of relay LKR to lock lamp LL, which lamp will be illuminated to tact. lie to, engage contact I 20.

indicate that the switch Wis locked and cannot be operated from the position which it occupies.

The system provided by this invention is arranged so that if theswitch W should creep, that is, if it should move from either its normal or reverse position, the switch motor M will be energized so as to return the switch W to the position which the switch should occupy, and so that the motor will be energized even though the lock relay LR is deenergized, w

When the lock relay LR, is energized, one or the other of the switch control relays RWE or NWR will be energized depending upon theposition of the switch control leverL.

If the normal switch control relay NWR is energized, contact I34 will be picked up andwill establish a circuit from wire I4, leading from terminal B of battery I 5, to brush I35 of the switch motor M, while the energizing circuit for the switch motor will be complete as soon as the switch Whas moved far enough away from the normal, position to cause switch operated con- When contact El i engages contact I20, switch motor M will be energized and will drive the switch to the normal position, thereby moving contact I I4 out of engagement with contact I20 and again int'errup'tingthe energizing circuit for the switch motor M. Similarly, if the switch W creeps at a time when the reverse switch control relay RWR is energized, at which time contact I25 is picked up and connects wire I4, leading from'terminal B of battery I5, to brush I28 of switch motor M, then when the switch W moves far enough away from the reverse position to cause contact II5 to engage contact I2 I, the motor will be operated to return the switch to the reverse position. a

It will be seen, therefore, that when the lock relay LR is energized, at which time one or the other of the switch control relays NWR and RWR is energized, the switch motor M will be energized to effect movement of the switch W back to its initial position if the switch should creep therefrom.

The system is also arranged so that if at a time when the lock relay LR is deenergized, at which time neither of the switch control relays RWR and NWR is energized, as explained in detail above, the switch W should creep from either its normal or reverse position, the proper one of the switch control relays RWR or NWR will be energized to thereby complete the energizing circuit for the switch motor M andcause it to effect movement of the switch W to the position which it should occupy.

When the switch W is in the normal position, the switch operated contacts I0 and II operate to establish circuits to energize the winding of the switch repeating relay WP in the normal direction with the result that the polar contacts of this relay are in their normal positions as shown in the drawing. g

If at such time the switch W should creep from the normal position, the switch operated contact I00 will engage the stationary contact I08 and thereby complete a circuit from wire 99, leading from normal polar contact 90, to contact I08 to which is connected a branch of wire IS leading to the terminal of the winding of relay NWR. The various parts of the apparatus' a're arranged and proportioned so that the contact I00 will engage contact I08 before contacts 0 look relay LR is deenergized its contact 92 is released and engages contact 93 to connect wire I4 leading from terminal B of battery I5 to wire 94, Accordingly, a circuitis established from terminal B of battery I5 to wirel9, and the winding of relay NVVR. is energized over a circuit which is traced from terminal B of battery I5 through wire I4, contacts 9293 of relay LR,

'wire 94, contacts 95'96 of relay .WP nOrmaI polar contacts 9?98 of relay WP, wire 09, switch contacts I00I08, wire 19, winding of relay NWR, wire 30, and the normal polarcontacts,

2820 of relay WP to which is connected wire I6 leading from terminal C of battery I5.

On energization of the winding of relayNWR its contact I30 is picked up, thereby establishing a circuit from wire I 5 leadingfrom terminal B of battery I 5 to brush I35 of the switch motor M. Since it isassumed that the switch .W has crept away from the normal position, the switch operated contact I I4 will be in engagement with the contact I20 to thereby complete the energizing circuit for the switch motor M and the motor M will be operated in a direction to return the switch W to the normal position.

As soon as the switch has reached the normal position, the contact H4 will be moved out of engagement with the contact I23, thereby interrupting the energizing circuit for the switch motor M with the result that the motor will cease to operate.

Likewise, on the return of the switch W to the normal position the contact I30 is moved out of engagement with the contact I08, thereby interrupting the previously traced circuit for energizing the winding of relay NWR with the result that this winding is deenergized and the relay contacts become released.

In similar manner, if the switch W is in the reverse position and should creep therefrom at a time when the lock relay LR is released, the switch control relay RWR will be energized to complete the energizing circuit for the switch motor M and cause the motor to return the switch to the reverse position.

At a time when the switch is in the reverse position, the switch operated contacts 10 and II establish circuits to supply current of reverse polarity to the winding of the switch repeating relay WP with the result that the polar contacts of this relay are in their reverse positions, while the neutral contacts of the relay are picked up.

As previously explained, the various parts of the apparatus are arranged and proportioned so that in the reverse position of the switch W, the switch operated contacts I0 and I I will remain in engagement with the stationary contacts as- I sociated therewith until after the switch operated contact I06 has been moved into engagement with stationary contact I II).

If at a time when the switch is in the reverse position it should creep therefrom, the contact I06 will be movedinto engagement with contact III] to thereby establish a circuit from wire IM to wire 93 leading to a terminal of the winding of relay RWR. The winding of relay RWR will thereupon become energized by current supplied over a circuit which is traced from terminal B of battery I5 through wire I4, contacts 9233 of relay LR, wire 94, neutral contacts 35-436 of relay WP, reverse polar contacts 9'I--II]2 of relay WP, wire H04, switch contacts IDS-I II], wire filL'winding of relay RWR, wire 33 and. reverse polar contacts 32-40 of relay WP to wire I6 leading to terminal C of battery I5.

On energization of the winding of relay RWR. its contact I25 will be picked up and will connect wire I4 to brush I28 of switch motor M. As the switch W is assumed to have crept from the reverse position, the contact II5 will engage contact I2I and complete the energizing circuit for the switch motor M and the motor will operate to return the switch to the reverse position.

When the switch W reaches the reverse position, the contact H5 is moved out of engagement with contact I2i, thereby interrupting the energizing circuit for the switch motor M with the result that the motor ceases to operate.

Similarly, when the switch W attains the reverse position, contact I06 is moved out of engagement with the contact H0, thereby interrupting the energizing circuit for the winding of reverse switch control relay RWR with the result that the winding becomes deenergized and its contact I25 is released.

The system provided by this invention is arranged so that if the position of the switch control level L is changed at a time when the lock relay LR is deenergized, no change will occur in the position of the switch W on subsequent energization of the lock relay LR. As previously explained, when the lock relay LR is deenergized, the circuits for energizing the relays NWR and RWR are interrupted so that neither relay can be energized. Since the contacts of relays RWR and NWR are both released, the energizing circuit for the winding of relay WRP is interrupted and the contact 36 of this relay is released, thereby interrupting connection between the wires 30 and 33.

When the switch W is in the normal position, the switch operated contacts I0 and Il establish a circuit to energize the winding of the relay WP in the normal direction and the polar contacts of this relay will be in their normal positions as shown in the drawing. If at this time the lock relay LR is deenergized and the switch control lever L is moved from its normal to its reverse position, the relay RWR will not become energized on subsequent energization of the winding of lock relay LR.

Thus it will be seen that when the switch control lever L is in the reverse position, its contact 41 engages static-nary contact 35 to thereby establish a circuit from wire 56, leading from terminal B of battery 25, to control wire 52. At this time the contacts of relay NWR are released and contact 53 connects control wire 52 to wire 86, while on picking up of contact 89 of relay LR wire 86 is connected to wire 90 leading to a terminal of winding RWR. However, it will be seen that no circuit is established to connect wire 33, leading from the other terminal of the winding of relay RWR, to the common wire 24 and thereby to terminal C of battery 25. This is true since polar contact 20 of relay WP is in its normal position and therefore out of engagement with reverse polar contact 32 to which is connected wire 33, while the contact 36 of relay WRP is released so that it does not establish a circuit between wires 33 and 33. Accordingly, when the contacts of relay LR become picked up, the circuit for energizing the winding of relay RWR remains interrupted and the contacts of this relay remain released, while the energizing circuit for the switch motor M remains deenergized, and the motor M does not move the switch W away from the normal position.

If it is desired to eiiect movement of the switch W from the normal position to the reverse position, this may be accomplished by first moving the switch control lever L from the reverse position to the normal position and then returning it to the reverse position.

On movement of the switch control lever L to the normal position contact 46 engages contact 55 and thereby establishes a circuit from terminal B of battery 25 to control wire 50, this circuit including wire 58, winding of relay LKR, wire 56, contacts 55-46 and wire 50. At this time the contact 5| of relay RWR is released and engages contact 16 which is connected to contact 'I! of lock relay LR. When the contacts of relay LR. become picked up, contact 'I'I engages contact I8 to thereby connect wire 53 to wire I9 which is connected to one terminal of the winding of the relay NWR. The other terminal of the winding of relay NWR has connected thereto wire 30 leading to normal polar contact 28 of relay WP which contact is engaged at this 75 time by polar contact to which is connected common wire 24 leading to terminal C of battery 25. It will be seen, therefore, that on movement of the switch control lever L to the normal position the winding of relay NWR is energized and the contacts of this relay become picked up.

As the switch W is assumed to be in the normal position, the switch operated contact H4 interrupts the circuit of the switch motor M so that and its contact 55 is picked up and establishes a connection from wire 35, leading from normal polar contact 28 of relay WP, to wire 33 leading to a terminal of relay RWR.

On subsequent movement of the switch control lever L from the normal to the reverse position a circuit is established to energize the winding of the relay RWR, while the circuit for energizing the winding of relay NWR is interrupted.

This circuit is'traced from terminal B of battery 25 through wire 58, winding of relay LKR, wire 55, lever contacts 555l, control wire 52, contacts 5385 of relay NWR, wire 85, contacts t'l89 of lock relay LR, wire 99, winding of relay RWR, wire 33, contacts 35-55 of relay WRP, wire 3t, normal polar contacts 28-20 of relay WP and common wire 2 to terminal C of battery 25. a 1 a On picking up of the contacts of relay RWR a circuit is established to energize the switch motor M to cause it to move the switch W from the normal to the reverse position, as previously explained in detail. 7

In like manner, if when the control lever L and the switch W are in the reverse position and the lock relay LR is released, the switch control lever L is moved from the reverse to the normal position, no change will occur in the position of the switch on subsequent energization of the lock relay LR.

When the lock relay LR is deenergized, the relays RWR and NWR are both deenergized, as previously explained, while the relay WRP is also deenergized with the result that its contact 35 is released.

When the switch V! is in the reverse position, the switch operated contacts I!) and H establish a circuit to supply current of reverse polarity to the winding of the polarized switch control relay WP with the result that the polar contacts of this relay are in their reverse positions, while the neutral contacts of the relay are picked up.

On movement of the switch control lever L from the reverse to the normal position the lever operated contact 45 engages contact 55 and thus establishes the circuit from terminal B of battery 25 to control wire 55. At this time, since relay RWR is deenergized, its contact 5| engages contact i6, but as contact ll of lock relay LR is released, no circuit is established to the winding of relay N'WR. The relay NWR will remain deenergized, therefore, and will not establish an energizing circuit for the switch motor M.

The energizing circuit'for the winding of relay NWR will not be established when the lock relay LR becomes energized and its contacts are picked up. When contact 1'! picks up and engages conthat no circuit is established from contact 28 and wire 30 to the common wire 24.

In addition, as previously stated, contact 36 of relay WRP is released so that a circuit is not established from wire 3!! to wire 53 leading to the reverse polar contact 32 of relay WP. It will be seen, therefore, that the circuit of the winding of the relay NWR is interrupted and that the winding does not become energized on picking up of the contacts of lock relay LR.

If it is desired to effect movement of the switch W from the reverse to the normal position, it may be accomplished by returning the switch control lever L to the reverse position and thereafter moving it to the normal-position.

0n movement of the switch control lever L to the reverse position a circuit is established to energize the winding of the switch control relay E PWR. This circuit is traced from terminal B of battery 25 through wire 55, winding or relay LKR, wire 55, lever contacts 654l, control wire 52, contacts 53-85 of relay NWR, wire 86, contacts til-85 of lock relay LR, wire 95, winding of relay RWR, wire 33, reverse polar contacts 32-20 of relay WP and common wire 24 to terminal C of battery 25.

On energization of the winding of relay RWR its contact 65 is picked up, thereby completing 1 the circuit for energizing the winding of relay WRP with the result that contact of this relay is picked up and completes the circuit between wires 33 and 3!].

On subsequent movement of the switch control lever L from the reverse to the normal position a circuit is established to energize the winding of the relay NWR, while the previously traced circuit for energizing the winding of relay RWR is interrupted.

The circuit for energizing the winding of relay NWR is traced from terminal B of battery 25 through wire 58, winding of relay LKR, wire 56, contacts 55-46, control wire 50, contacts 5I'l6 of relay RWR, contacts ii-l8 of lock relay LR, wire 19, winding of relay NWR,,wire 35, contacts 35-35 of relay WRP, wire 33, reverse polar contact 3225 of relay WP and neutral wire 24 to terminal C of battery 25.

On picking up of the contacts of relay NWR a circuit is established to energize the switch motor M to cause it to move the switch W from the reverse to the normal position in the manner heretofore described in detail.

This system is also arranged so that storage of switch control will be prevented while the lock relay LR is deenergized even though the switch W creeps and one of the switchcontrol relays is energized to effect return of the-switch to th position from which it moved.

When the lock relay LR is deenergized contact 92 is released and interrupts the connection from wire M, leading from terminal B of battery I5, to wire 39, while contact 92 connects wire M to wire 94. Wire 9 is connected by polar contact 9'! of relay WP to wire 99 or wire 154, depending upon the position occupied by the contact, and it is through these circuits current is supplied to energize the switch control relays in the event the switch creeps. As contact :92 does not connect wire 14 to wire 39, on picking up of the contacts of one or" the switch control relays and resultant establishment of a circuit from wire 39 to wire it, the winding of relay WRP is not energized and contact 36 remains released.

If the lock relay LR should become energized at a time when one of the switch control relays is energized as a result of creeping of the switch, the contact 92 of relay LR. will become picked up and will interrupt the circuit for energizing the switch control relay and the contacts of the switch. control relay will become released and will interrupt connection from wire 39 to wire 40.

On picking up of the contact 92, of relay LR it engages contact 45 and establishes connection from .wire M to wire 39. The connection from wire M to wire 39 by contact 92 of relay LR may be established before connection of wire 39 to wire 40 is interrupted by the contact of the switch control relay. However, this overlapping will be momentary only and the contact of the switch control relay will become released before the winding of relay WRP has been energized long enough to cause the contact 35 to become picked up. Contact 36, therefore, will not establish a circuit between wires 30 and 33, and if the switch control lever L is out of correspondence with the switch W, and therefore out of correspondence with the, polar contacts of the relay WP, a circuit will not be established to energize one of the switch control relays and the motor M will not be energized to move the switch W.

If the operator desires to effect movement of the switch he may do so by returning the control lever to a position in correspondence with the switch and the switch repeating relay. This will establish a circuit to energize one of the switch control relays, and when the, contacts of this relay become picked up a circuit is established to energize the winding of relay WRP so that contact 36 becomes picked up.

From the foregoing it will be seen that the system shown in Fig. 1 of the drawing provides means employing two control wires and a neutral wire to selectively control the motor for operating the track switch, and for also providing at the control point an indication as to whether or not the switch is locked, and also whether or not the switch and the switch control lever are in correspondence.

In Fig. 2 of the drawing I have shown a modified form of system in which indications are given as to the position occupied by the switch. In the system shown in Fig. 2 indication lamps are provided which are controlled in such a manner that upon movement of the switch control lever to either of its positions, and on subsequent movement of the switch to the corresponding position, a lamp is illuminated to indicate that the switch has attained the position corresponding to the position of the control lever.

. The system shown in Fig. 2 of the drawing is the same as that shown in Fig. l of the drawing exceptfcr some of the apparatus at the control point, as will be explainedin detail below, and

the same reference characters are employed in Fig. 2 of the drawing as are employed in Fig. 1 of the drawing to indicate elements which are common to the two systems.

I The modification shown in Fig. 2 of the drawing does not employ the relay WKR and the transit light TL which are employed in the system shown in Fig. 1. Instead the modification shown in Fig. 2 has a normal indication relay NWK, a reverse indication relay RWK, and normal and reverse indication lamps NL and RL.

One terminal of the winding of the relay NWK is connected by a wire Ml to contact 60 which is engaged by lever contact 47 in the normal position of the switch control lever L. The other terminal of the winding of the relay NWK has a branch of the wire 62 connected thereto, while the relay NWK has a contact I63 which is constantly connected to wire 58 leading to terminal B of battery 25. The contact M3 when picked up establishes a circuit to illuminate the normal indication lamp NL.

One terminal of the winding of the reverse indication relay RWK is connected by a wire 545 to the contact 64 which is engaged by lever contact 45 in the reverse position of the switch control lever L. The other terminal of the winding of the relay RWK has connected thereto a branch of the wire 62 leading from the terminal C of battery 25. The relay RWK has a contact I46 which has connected thereto a branch of the wire 58 leading from terminal B of battery 25, while the contact when picked up completes a circuit to illuminate the reverse indication lamp RL.

The circuits for energizing the winding of the relay LKR are the same as described in detail in connection with the system shown in Fig. 1 of the drawing. The relay LKR has a movable contact 66 which has constantly connected thereto a branch of the wire 58 leading from terminal B of the battery 25, while the contact 66 when released establishes a circuit to illuminate lock lamp LL.

In the operation of the modification shown in Fig. 2 the relay LKR is controlled in the manner described in detail in connection with the system shown in Fig. 1 of the drawing. As long as the lock relay LR is energized, the winding of the relay LKR is energized in series with the winding of one or the other of the switch control relays NWR. or RWR depending upon the position of the switch control lever L. As long as the winding of the relay LKR. is energized, its contact 66 is picked up and interrupts the circuit for the lamp LL.

In the event, however, that the lock relay LR becomes deenergized the energizing circuit for the winding of the relay LKR is interrupted and the contact 66 is released and thereby completes the circuit to the lamp LL which is thereupon illuminated to indicate that the switch W is locked and that its position cannot be changed.

When the switch control lever L is in the normal position, as shown in Fig. 2 of the drawing, the winding of the relay NWK is energized by current supplied from the battery l5 in the manner explained in detail below. At this time the switch W is in the normal position, the switch control relay NWR is energized and the polarized relay WP is energized in the normal direction.

As a result, when the switch W is in the normal position the winding of the relay NWK is energized by current supplied from the battery I5 over a circuit which is traced from terminal B of the battery (see Fig. 1 of the drawing), through wire M, neutral contacts 83-85 of relay WP, normal polar contacts 84-83 of relay WP, wire 82, contacts til-53 of relay NWR, control wire 52, lever contacts 41-60, wire Ml, winding of relay NWK and wire 62 to common wire 24 which is connected by wire IE to terminal C of battery l5.

As the winding of relay NWK is energized, contact I43 is picked up and establishes the circuit to energize the lamp NL to indicate that the switch W is in the normal position.

In this position of the switch control lever L the contact 55 does not engage stationary contact 64 and the circuit of the winding of the relay RWK, therefore, is interrupted and the contact M6 is released with the result that lamp BL is not lighted.

In similar manner, when the switch control relay L is in the reverse position, the relay RWK is energized and the relay NWK is deenergized, while the lamp BL is lighted and the lamp NL is extinguished.

When the control lever L is moved to the reverse position, the previously traced circuit for energizing the winding of the relay NWK is interrupted, while a circuit is established to energize the winding of relay RWK.

When the switch control lever L is moved to the reverse position, a circuit is established to energize the relay RWR, and when the switch W attains the reverse position, the relay WP is energized with current of reverse polarity as ex plained in detail in connection with the system shown in Fig. 1 of the drawing.

In this position of the switch control lever L the winding of the relay RWK is energized over a circuit which is traced from terminal B of battery it (see Fig. 1), wire it, neutral contacts 8885 of relay WP, reverse polar contacts t t-IQ of relay WP, wire l3, contacts 52-51 of relay RWR, control wire Bil, lever contacts, 65-43%, wire I 45, winding of relay RWK, wire 62 to common wire 24 which is connected by wire E6 to terminal of battery l5.

As the winding of relay RWK is energized, its contact Mi; is picked up and establishes the circuit to energize the reverse lamp RL which is illuminated to indicate that the switch W occupies the reverse position.

Although I have herein shown and described only two forms of the improved switch control and indication system embodying my invention, it is understood that various changes and modifications may be made therein within the scope of the appended claims without departing from the spirit and scope of my invention.

Having thus described my invention, what I claim is:

1. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third conductor, a control member movable between a normal and a reverse position, a first and a second source of current, the control member being operable in its normal position to connect the first source of current to the first and second conductors and being operable in its reverse posi tion to connect the first source of current to the first and third conductors, a normal control device energized from the first and second conductors and operable when energized to eiiect operation of the motor to cause it to move the switch to the normal position, a reverse control device energized from the first and third conductors and operable when energized to efiect operation of the inoter to cause it'to move the switch to the reverse position, switchindication means operable when energized to provide one indication of the condition of the switch and operable when deenergizc-d to provide a difierent indication of the condition of the switch, the control member being operable in the normal position to connect the indication means to the first and third conductors and being operable in device the reverse position to connect the indication means to the first and second conductors, a

second source of current, and means controlled motor for moving the switch between a normal" and a reverse position, a normal control device operable when energized to efiect mov'ementof the switch to the normal position, a reverse control device operable when energized to effect movement of the switch to the reverse position, a first, a second and a third conductor, a control member movable between a normal and a reverse position, a source of current, the control member being operable in its normal position to connect the source of current to the first and second conductors and being operable in the reverse position to connect the source of current to the first and third conductors, means controlled by and actuated in accordance with the position of the switch, said means being operable when the switch is in one position to establish a circuit to connect the first conductor to one of said control devices and being operable when the switch is in the other position to establish a circuit to connect the first conductor to the other of said control devices, a circuit controlled by the reverse control device for connecting the second conductor to the normal control device, and a circuit controlled by the normal control device for connecting the third conductor to the reverse control device.

3. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a normal control device operable when energized to efiect movement of the switch to the normal position, a reverse control operable when energized to effect movement of the switch to the reverse position, a first, a second and a third conductor, a control member movable between a normal and a reverse position, a source of current, the control member being operable in its normal position to connect the source of current to the first and second conductors and being operable in the reverse position to connect the source of current to the first and third conductors, means controlled by and actuated in accordance with movement of the switch, said means being operable when the switch is in one position to establish a circuit to connect the first conductor to one of saidcontrol devices and being operable when the switch is in the other position to establish a circuit to connect the first conductor to the other of said control devices, 'a circuit controlled by the reverse control device for connecting the second conductor to the normal control device, a circuit controlled by the normal control device for connecting the third conductor to the reverse control device, a slow acting relay controlled jointly by said normal and. reverse control devices, and a circuit controlled by said relay and establishing connection between the circuits by means of which the said first conductor is connected to said normal and reverse control devices.

Y 4. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a normal control device operable when energized to effect movement of the switch to the normal position, a reverse control device operable when energized to efieot movement of the switch to the reverse position, a first, a second and a third conductor, a control member movable between a normal and a reverse position, a source of current, the control member being operable in its normal position to connect the source of current to the first and second conductors and being operable in the reverse position to connect the source of current to the first and third conductors, means controlled by and actuated in accordance with the position of the switch, said means being operable when the switch is in the normal position to establish a circuit to connect the first conductor to the normal control device and being operable when' the switch is in the reverse position to establish a circuit to connect the first conductor to the reverse control device, a circuit controlled by the reverse control device for connecting the second conductor to the normal control device, a circuit controlled by the normal control device for connecting the third conductor to the reverse control device, a slow acting relay controlled jointly by said normal and reverse control devices, and a circuit controlled by said relay and establishing connection between the circuits by means of which the said first conductor is connected to said normal and reverse control devices.

5.'In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a normal control device operable when energized to effect movement of the switch to the normal position, a reverse control device operable when energized to effect movement of the switch to the reverse position, a first, a second and a third conductor, a control member movable between a normal and a reverse position, a source of current, the control member being operable in its normal position to connect the source of current to the first and second conductors and being operable in the reverse position to connect the source of current to the first and third conductors, means controlled by and operated in accordance with the position of the switch, said meansbeing operable when the switch is in one position to establish a circuit to connect the first conductor to one of said control devices and being operable when the switch is in the other position to establish a circuit to connect the first conductor to the other of said control devices, a circuit controlled by the reverse control device for connecting the second conductor to the normal control device, a circuit controlled by the normal control device for connecting the third conductor to the reverse control device, and a lock relay controlled by trafiic conditions in the vicinity of the said switch, said lock relay controlling the circuits for energizing the normal and reverse control devices.

6. In combination. a railway track switch, a motor for moving the switch between a normal and a reverse position, a normal control device operable when energized to effect movement of the switch to the normal position, a reverse "control device operable when energized to effect movement of the switch to the reverse position, a first, a second and a third conductor, a control member movable between a normal and a reverse position, a-source of current, the control member being operable in its normal position to connect the source of current to the first and second conductors and being operable in the reverse position to connect the source of current to the first and third conductors, means controlled by and operated in accordance with the position of the switch, said means being operable when the switch is in one position to establish a circuit to connect the first conductor to one of said control devices and being operable when the switch is in the other position to establish a circuit to connect the first conductor to the other of said control devices, a circuit controlled by the reverse control device for connecting the second conductor to the normal control device, a circuit controlled by the normal control device for connecting the third conductor to the reverse control device, and a lock relay controlled by trafiic conditions in the vicinity of the said switch, said relay controlling lock relay contacts when picked up establishing the circuits for energizing the normal and reverse control devices, each of said control devices having associated therewith a supply circuit controlled by said lock relay and by means of which said control device may be supplied with current, each such supply circuit being controlled in accordance with the position of the switch and being completed when and only when the lock relay contacts are released and the switch moves away from the position to which the control device which is energized by the said supply circuit is effective to cause movement of the switch.

7. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a normal control device operable when energized to effect movement of the switch to the normal position, a reverse control device operable when energized to efiect movement of the switch to the reverse position, a first, a second and a third conductor, a control member movable between a normal and a reverse position, a source of current, the control member being operable in its normal position to connect the source of current to the first and second conductors and being operable in the reverse position to connect the source of current to the first and third conductors, means controlled by and operated in accordance with the position of the switch, said means being operable when the switch is in one position to establish a circuit to connect the first conductor to one of said control devices and being operable when the switch is in the other position to establish a circuit to connect the first conductor to the other of said control devices, a circuit controlled by the reverse control device for connecting the second conductor to the normal control device, a circuit controlled by the normal control device for connecting the third conductor to the reverse control device, and a slow acting relay having a movable element having a normal position and an operated position, said element being effective in its operated position to connect the first conductor to both the normal and the reverse control devices irrespective of the condition of the means controlled in accordance with the position of the switch, either of said control devices being operative when energized to effect movement of the relay element to the operated position.

8. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third conductor, a first and a second source of current each having one terminal connected to said first conductor, a control member movable between a normal and a reverse position, said control member being operable in the normal position to connect the other terminal of the first source of current to the second conductor and being operable in the reverse position to connect the other terminal of said first source of current to the third conductor, a normal control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device energized from the first and third conductors and operable when energized to cause the motor to move the switch to the reverse position, an element controlled by and actuated between a'normal and a reverse position in accordance with movement of the switch, said element being operable in the normal position to connect the other terminal of the second source of current to the third conductor and being operable in the reverse position to connect the other terminal of said second source of current to said second conductor, and indication means operable when energized to provide an indication of the condition of the switch, said indication means being connected to said first conductor, the control member being operable in the normal position to connect the indication means to the third conductor and being operable in the reverse position to connect the indication means to the second conductor.

9. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third conductor, a first and a second source of current each having one terminal connected to said first conductor, a control member movable between a normal and a reverse position, said control member being operable in the normal position to con nect the other terminal of the first source of current to the second conductor and being operable in the reverse position to connect said other terminal of said first source of current to the third conductor, a normal control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device energized from the first and third conductors and operable when energized to cause the motor to move the switch to the reverse position, an element controlled by and actuated between a normal and a reverse position in accordance with movement of the switch, said element being operable in the normal position to connect the other terminal of the second source of current to the third conductor and being operable in the reverse position to connect the other terminal of said second source of current to said second conductor, a, normal and a reverse indication means each operable when energized to provide an indication of the position occupied by the switch, each of said indication means being connected to said first conductor, the control member being operable in the normal position to connect the normal indication means to the third conductor and being operable in the reverse position to connect the reverse indication means to the second conductor.

10. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a'first, a second and a third conductor, a first and a second source of current each having one terminal connected to said first conductor, a control member movable between a normal and a reverse position, said control member being operable in the normal position I to connect the other terminal of the first source of current to the second conductor and being operable in the reverse position to connect said other terminal of said first source of current to the third conductor, a normal control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device energized from the first and third conductors and operable when energized to cause the motor to move the switch to the reverse position, an element controlled by and actuated between a normal and a reverse position in accordance with movement of the switch, a circuit controlled. by the normal control device and by said element and operable when said element is in the normal position to connect said other terminal of said second source of current to said third conductor,

a circuit controlled by the reverse control device and by said element and operable when said element is in the reverse position to connect said other terminal of said second source of current tion of the condition of the switch, said indication means'being connected to said first conductor, the control member being operable in the normalposition to connect the indication means to the third conductor and being operable in the reverse position to connect the indication means to the second conductor. I

11, In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third conductor, a normal control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device. energized from the first and third conductors and being operable when energized to cause the motor to move the switch'to the reverse position,'a source of current, a control member movable between a normal and a reverse position,

said member being operable in the normal position to connectsaid source of current to the first and second conductors and being operable in the reverse position to connect said source of current to the first and third conductors, an element controlled by and movable'between a normal and a reverse position in accordance with movement of the switch, said element controlling connection of the first conductor with said control devices and being operable in its normal position to connect the first conductor to the normal control device and being operable in its reverse position to,

connect said first conductor to the reverse control device, and means controlled jointly by said normal and reverse control devices for also establishing connection from said first conductor to said energized from the first and third conductorsand being operable when energized to cause the motor to move the switch to the reverse position, a source'of current, a control member movable between a normal and a reverse position, said member being operable in thenormal position to connect saidsource of current to the first and second to said second conductor, and indication means operable when energized to provide an indicaconductors and being operable in the reverse position to connect said source of current to the first and third conductors, and an element controlled by and movable between a normal and a reverse position in accordance with movement of the switch, said element controlling connection of the first conductor with said control devices and being operable in its normal position to connect the first conductor to the normal control device and being operable in its reverse position to connect said first conductor to the reverse control device, the normal control device controlling connection of said third conductor with said reverse control device, and the reverse control device controlling connection of said second conductor with said no mal control device.

13. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third, conductor, a normal'control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device energized from the first and third conductors and being operable when energized to cause the motor to move the switch to the reverse position, a source of current, a control member movable between a normal and a reverse position, said member being operable in the normal position to connect said source of current to the first and second conductors and being operable in the reverse position to connect said source of current to the first and third conductors, an element controlled by and movable between a normal and a reverse position in accordance with movement of the switch, said element controlling connection of the first conductor with said control devices and being operable in its normal position to connect the first conductor to the normal control deviceand being operable in its reverse means controlled jointly by said normal and reverse control devices for also establishing connection from said first conductor tosaid normal and reverse control devices.

14. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third conductor, a normal control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device energized from the first and third conductors and being operable when energized to cause the motor to move the switch to the reverse position, a source of current, a control member movable between a normal and a reverse position, said member being operable in the normal position to connect said source of current to" the first and secondconductors and being operable in the reverse position to connect said source of current to the first and third conductors, an element controlled by and movable between a normal and a reverse position in accordance with movement of the switch, said element controlling connection of the first conductor with said control devices and being operable in its normal position to con-' nect the first conductor to the normal control device andbeing operable in its reverse position to connect said first conductor to the reverse con-.

trol device, and a slow acting relay controlled jointly by said control devices, said relay being operative when either one of said control devices is energized to establish a circuit to connect the first conductor to the other one of said control devices, said relay being operative on deenergization of a control device to interrupt such circuit only after a predetermined time interval.

15. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third conductor, a normal control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device energized from the first and third conductors and being operable when energized to cause the motor to move the switch to the reverse position, a source of current, a control member movable between a normal and a reverse position, said member being operable in the normal position to connect said source of current to the first and second conductors and being operable in the reverse position to connect said source of current to the first and third conductors, an element controlled by and movable between a normal and a reverse position in accordance with movement of the switch, said element controlling connection of the first conductor with said control devices and being operable in its normal position to connect the first conductor to the normal control device and being operable in its reverse position to connect said first conductor to the reverse control device, a slow acting relay controlled jointly by said control devices, said relay being operative when either one of said control devices is energized to establish a circuit to connect the first conductor to the other one of said control devices, said relay being operative on deenergization of a control device to interrupt such circuit only after a predetermined time interval, and a lock relay responsive to traffic conditions in the vicinity of the switch and controlling both of said control devices.

16. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third conductor, a normal control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device energized from the first and third conductors and being operable when energized to cause the motor to move the switch to the reverse position, a source of current, a control member movable between a normal and a reverse position, said member being operable in the normal position to connect saidsource of current to the first and second conductors and being operable in the reverse position to connect said source of current to the first and third conductors, an element controlled by and movable between a normal and a reverse position in accordance with movement of the switch, said element controlling con nection of the first conductor with said control devices and being operable in its normal position to connect the first conductor to the normal control device and being operable in its reverse position to connect said first conductor to the reverse control device, a second source of current, the normal control device controlling means to connect said second source of current to the first and third conductors, the reverse control device controlling means to connect the second source of current to the first and second conductors, and

indication means operable when energized to provide an indication of the condition of the switch, the control member being operable in the normal position to connect the indication means to the first and third conductors and being operable in the reverse position to connect the indication means to the first and second conductors.

17. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third conductor, a normal control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device energized from the first and third conductors and being operable when energized to cause the motor to move the switch to the reverse position, a source of current, a control member movable between a normal and a reverse position, said member being operable in the normal position to connect said source of current to the first and second conductors and being operable in the reverse position to connect said source of current to the first and third conductors, an element controlled by and movable between a normal and a reverse position in accordance with movement of the switch, said element controlling connection of the first conductor with said control devices and being operable in its normal position to connect the first conductor to the normal control device and being operable in its reverse position to connect said first conductor to the reverse control device, a lock relay responsive to trafiic conditions in the vicinity of said switch and controlling the circuits for energizing both of said control devices, an indication relay connected in series with the circuit by means of which one terminal of said source of current is connected to said second or third condoctors, and switch indication means controlled by said indication relay.

18. In combination, a railway track switch, a motor for moving the switch between a normal and a reverse position, a first, a second and a third conductor, a normal control device energized from the first and second conductors and operable when energized to cause the motor to move the switch to the normal position, a reverse control device energized from the first and third conductors and operable when energized to cause the motor to move the switch to the reverse position, a first and a second source of current, indication means operable when energized to provide an indication of the condition of the switch, a control member movable between a normal and a reverse position, said member being operable in the normal position to connect the first source of current to the first and second conductors and to also connect the indication means to the first and third conductors, said member being operable in the reverse position to connect the first sourceof current to the first and third conductors and to also connect the indication means to the first and second conductors, an element controlled by and movable between a normal and a reverse position in accordance with movement of the switch, said element controlling connection of the first conductor with said control devices and also controlling connection of said second source of current to said conductors, said element being operable in the normal position to connect said second source of current to the first and third conductors and being operable in the reverse position to connect said second source of current to the first and second conductors.

19. In combination, a railway track switch, a motor for moving said switch between a normal and a reverse position, an electroresponsive control device having a first condition in which it causes the motor to move the switch to the normal position and having a second condition in which it causes the motor to move the switch to the reverse position, said control device also having a third condition in which it prevents operation of the motor, a manually controlled member movable between a normal and a reverse position, said member being operable in the normal position to establish a circuit through which current may be supplied to the control device to cause said device to assume its first condition, said member being operable in the reverse position to establish a circuit through which current may be supplied to said control device to cause said device to assume its second condition, means controlled by the switch and controlling energization of said control device by current supplied as a result of operation of the manually controlled member, said switch controlled means being operable when and only when the switch is in the normal position to permit energization of said control device only to cause said device to assume its first condition and being operable when and only when the switch is in its reverse position to permit energization of said control device only to cause said device to assume its second condition, and means controlled by said control device and also controlling energization of said device by current supplied as a result of operation of said manually controlled member, said means being operable when said control device is in either its first or second condition to establish a circuit to permit energization of said control device by current supplied through the circuits controlled by said manually controlled member to cause said device to assume the other one of said first or second conditions, said means being operable to maintain said circuit for a predetermined time interval after said control de vice assumes its third condition, whereby on a change in the position of the manually controlled'member a circuit is maintained to effect a corresponding change in the condition of the said control device provided the change in the condition of the control device is completed promptly.

20. In combination, a railway track switch, a motor for moving said switch between a normal and a reverse position, a first relay operable when energized to condition the motor to move the switch to the normal position, a second relay operable when energized to condition the motor to move the switch to the reverse position, a manually controlled member movable between a normal and a reverse position, said member being operable in the normal position to establish a circuit through which current may be establish only the circuit for energizing the second relay, and a slow acting relay controlled by'said first and second relays, said slow acting relay also controlling energization of said first and second relays by current supplied as a result of movement of said manually controlled memher, said slow acting relay being operable when the first relay is energized to establish a circuit to permit energization of the second relay and being operable when the second relay is energized to establish a circuit to permit energization of the first relay, said slow acting relay being operable to maintain the circuit established by said slow acting relay for a time interval subsequent to the release of the first or second relay, whereby on a change in the position of the manually controlled member a circuit is established to energize the deenergized one of the first and second relays provided energization of such relay is effected within a predetermined time subsequent to deenergization of the energized one of the said relays.

21. In combination, a railway track switch, a motor for moving said switch between a normal and a reverse position, a first control relay operable when energized to condition the motor to move the switch to the normal position, a second control relay operable when energized to condition the motor to move the switch to the reverse position, a first, a second and a third conductor, a first and a second source of current each having one terminal connected to said first conductor, a first indication relay having one terminal of its winding connected to said first conductor, a second indication relay having one terminal of its winding connected to the other terminal of said first source of current, a manually controlled member movable between a normal and a reverse position, said member being operable in the normal position to connect the other terminal of the winding of the first indication relay to the second conductor and to connect the other terminal of the second indication relay to the third conductor, said member being operable in the reverse position to connect the other terminal of the first indication relay to the third conductor and to connect the other terminal of the second indication relay to the second conductor, means operable when and only when the switch is in the normal position to establish connection from the first conductor to one terminal of the winding of the first control relay and to establish a circuit through which connection may be established from the other terminal of the second source of current to the third conductor, means operable when and only when the switch is in the reverse position to establish connection from the first conductor to one terminal of the winding of the second control relay and to establish a circuit through which connection may be established from the other terminal of the second source of current to the second conductor, means controlled by the second control relay for establishing connection from the second conductor to the other terminal of the Winding of the first control relay, means controlled by the first control relay for establishing connection from the third conductor to the other terminal of the second control relay, means controlled jointly by said control relays for establishing connection from the first conductor to the windings of said control relays, and means controlled jointly by said indication relays for indicating the condition of the switch.

HENRY S. YOUNG.

CERTIFICATE OF CORRECTION.

Patent-No. 2,177,125. October at, 19 9.

' HENRY S. YOUNG.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 11, second column, line 19, claim 6, strike out the words relay controlling; and

that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 5th day of December, A. D. 1959.

' Henry Van Arsdale,

( Acting Commissioner of Patents. 

